Yarn binder and trimmer



March 16,1926. 1,577,364

F. W. ROBINSON YARN BINDER AND TRIMMER Filed May 1, 1923 3 Sheets-Sheet 1 INVENTOR:

ATTORNEYS.

March 16 1926. 1 1,577,364

F. w. ROBINSON YARN BINDER AND TRIMMER Filed May 1, 1923 5 Sheets-Sheet 2 J M;;m NToR= A r fiZ M W- ATTORN EYS.

Patented Mar. 16, 1926.

UNITED STATES FRANK W. ROBINSON, 0F READING, PENNSYLVANIA ASSIGNOR TO SCHUYLKILL HOBIEBY MILLS, 1110., OF READING, SYLVANIA.

Application filed May 1,

To all whom it may concem:

Be it known that I, FRANK W. ROBINSON, a citizen of the United States, residing at Reading, county of Berks, State of Pennsylvania, have invented a new and useful Yarn B nder and Trimmer, of which the following is a s ecification.

The object 0 my present invention isto devise a novel construction of a yarn binder and trimmer which is constructed and arranged in such a manner that it can be readily connected to the machine without interfering in any manner with the yarn feeding fingers.

It further comprehends a novel construction of a binder and trimmer and novel means for effecting the operation thereof.

Other novel features of construction and advantage will hereinafter. more fully appear in the detailed description. For the purpose of illustrating my invention, I have shown in the accompanying drawings a typical embodiment thereof which is at present preferred by me, since this embodiment will be found in practice to ive satisfactory and reliable results. It is, owever, to be understood that the various instrumentalities of which my invention consists can be'variously arranged and organized and that my invention is not limited to the precise arrangement and organization of these instrumentalities as herein shown and described. Figure 1 represents, in side elevation, a circular knittmg machine in conjunction with which a yarn binder and trimmer, embodying my invention, are employed.

- Figure 2 represents a top plan view of a portion of the construction.

Figure 3 represents, in front elevation,

the yarn binder and trimmer and-certainof their adjuncts.

Figure 4 represents, in side elevation, a movable binder member. a.

Figure 5 represents, in elevation, a cutter employed.

Figure 6 represents, in elevation, a combined binder and cutter member Figure 7 represents a sectionon line'77 of Flgure 8. v

Figure 8 represents a section on line 8-8 of Flgure 7.

Figure 9 represents, in elevation, certain parts ofthe operative mechanism.

PENNSYLVANIA, A oonrona'rronor PENN- YARN nmnnn'ann TRIMMER.

192s.v Serial, No. 635,840.

Figure 10 represents a top planview of a lever employed.

Figure 11 represents a plan view of a cam ring employed.

Similar numerals of reference indicate corresponding parts.

Referring to the drawings.

1 designates a circular knitting machine of any desired or conventional design and in conjunction with whicha yarn binder and trimmer, embodying my invention, are employed. 2 designates theconventional latch ring to which is connected a bracket 3 in any desired manner.. A rock shaft 4 is journalled in the bracket-3 and has connected to ita rock arm 5 against which bears the upper end of a bell crank lever 6 which is rotatably mounted on a stud shaft 7 carried by a stationary bracket 8 which is secured to a fixed portion of the machine frame. Pivoted to the bracket 8 is a lever 9, one end of which is disposed between the arms of the bell crank lever 6 while its opposite end is deflected at an angle and has connected to it a rod 10, one end of said rod being connected to a lever 11 which is controlled by a cam 12 connected with or forming a part of the pattern or cam drum of the machine.

13- designates a spring, one end of which is connected to a fixed portion of the machine frame while its opposite end is connected at 14 to the upper arm of the lever 6. The lower arm of the lever 6 has connected with it a roller 15 in any desired manner and this roller is adapted to travel upon the upper surface of the cam 16 best seen in Fig. 11, which latter is provided at one end with the cam face 17. The cam 16 is in the form of a partial ring which is secured in any desired manner to the cylinder so as to move therewith. 18 designates a spring one end of which is connected with the screw 19 which secures the rockarm 5 to its shaft 4- and the other end of said spring is secured to a fixed portion of the machine frame so that the tendency of said spring will be to maintain the'rock arm 5 in its down position.

20 designates a binder and cutter member which is fixed to the bracket 3 by means of fastenin devices 21. This member 20 is plrovidef with a slot 22 and it is formed tionary binder and cutter member 20. The.

movable binder is also provided near its lower end with a forwardly extending lug 30 which travels in the recess 31 of the combined binder and cutter member 20, see Figures 3 and 6.

32 designates a movable cutter or knife which is provided with an elongated slot 33 through which extends the rock shaft 4. On the front face of the cutter 32 is an outwardly extending lug 34, and this lug is connected-with the lug 27 of the movable binder 25 by means of a spring 35. The cutter 32 is provided with a vertically disposed slot 36 through which is adapted to pass the pin 28 of the movable binder 25. The lower end of the cutter 32 is deflected inwardly so that a cutting edge 37 is formed. A spring 38 has one end connected to a pin 39 on the combined binder and cutter 20 and its opposite end is connected to the pin 40 on the cutter 32. The rock shaft 4 is provided with an arm 41, see Figure 3, which is positioned between the lugs 27 and 34. I have found in devices of this general character, that where an anvil blow is employed to sever the yarn, the action is not reliable or satisfactory because in continuous use, the cutting edge is destroyed by its impact upon the anvil, so that this device 'soon deteriorates in practical use. In my invention by reason of the employment of the hooked edges 23 and 37 collocated in the manner above described, and as seen in Fig. 7, I am enabled to provide first a positive clamp for the yarn prior to shearing and second an effective clean sheared end of the yarn, so that in my device instead of the yarn being broken by a hammering action, 1t 'is actually out subsequent to being clamped by a positive shearingaction, which is attained by the employment of said two hooked edges-23 and 37, in conjunction with the cutting edge 24.

' It will be further apparent that owing to the limited space. it is desirable to assemble the elements 20, 32, and 25 as compactly as possible, and to this end, the parts 32 and 20 which constitute the outer assembly, and 23 which constitutes the inner assembly, are collocated, so that the lower edge of the binder 25 is received by the hooked end 23, so as first to clamp the yarn, and a further movement of the edge 37 against the edge 24, sever-s the yarn, as will be understood from Fig. 7. r

42 designates a splice finger constructed and operated in the usual manner, and 43 designates yarn fingers, which are constructed and operate in the usual manner.

The operation of my novel yarn binder and trimmer is as follows The spring 18 has a tendency to rock the rock shaft 4 in such a direction that both the movable knife 32 and movable binder 25 are in their down position, which is the cutting and clamping position. \Vhen the cam 12 is cooperating with the lever 11, it exerts a downward pull on the rod 10, thereby moving upwardly the lever 9 to rock upwardly the lever 6 so that the roller 15 carried by such lever will be in the path of the cam 16, so that during the revolution of the needle cylinder, the roller 15 will ride up the cam face 17 and travel on top of the cam 16.

As the roller 15 moves up the cam face 17, it causes the lever 6 to be rocked on its fulcrum and thereby rock the shaft 4, so that the rock arm 41 hearing against the lug 27 on the movable binder 25; will cause such binder to move upwardly. As the movable binder 25 moves upwardly, the spring 35 connected to the movable binder 25 and to the cutter 32 will cause said cutter to move upwardly. Now when the splice yarn finger 42 is raised in the usual and well known manner, the yarn which it carries will be received in the deflected lower portion of the stationary combined binder and cutter member 20, as best seen in Figure 3.

When the roller 15 leaves the cams 16, due to the action of the spring 13 and the spring 18, the rock shaft 4 will be rocked in a reverse direction to that in which it was rocked before, so that the rock arm 41 will move downwardly the cutter 32 and in unison with it the movable binder 25 which travels in advance of the thread so as to bind the yarn between it and the member 20. The continued downward movement of the cutter 32 causes the yarn to be severed and to be retained in the binder. When the splice yarn finger 42 is brought downwardly, the splice yarn is brought into knitting position. The cycle of the operation as described is repeated during each operation of binding and trimming the splicing yarn.

If a high splice is being knit, the high splice is knit about one-half of the circle of the needles and then floats across the other half, as ordinarily used.

In accordance with my invention, when the finger raises the splicing yarn out of action'it brings it into proper position to enter the hinder or clamp, and the yarn is bound and cut. lVhen the proper time comes to bring the splicing yarn into action, the splicing yarn finger drops and the binder releases, thus effecting a saving of the extra yarn which would otherwise float across the cylinder.

When the yarn splicing finger drops into action, the yarn is knit in for about onehalf the circle of needles or as far as it is desired to run the. splice. The binder is open with my present invention, they can be so located that they will not interfere inany manner with the knitting operation, and the space within the cylinder is free to be utilized for all purposes.

It will now be apparent that I have devised a new and useful yarn binder and trimmer which embodies the features of advantage enumerated as desirable in the statement of the invention and the above descrip-' tion, and while I have, in the present instance, shown and described an embodiment thereof which will give in practice satisfactory and reliable results, it 'is to be understood that this embodiment is susceptible of modification in various particulars without departing from the spirit or scope of the invention or sacrificing any of its advanta es.

Having thus described my invention, w at I claim as new and desire to secure byLetters Patent, is:

1. In a yarn binder and trimmer, a stationary binder and cutter member having a hooked end, relatively movable binder and cutter members mounted to co-operate with said hooked end, said cutter having a hooklike cutting portion, yielding means to efl'ect relative movement of said members in one direction, a third member to efi'ect relative movement of said movable binder and cutter members in a reverse direction, attern controlled means to move said thir member into its active position, and cylinder controlled 'means to actuate said third member when it is in its active position. i

2. In a yarn binder and trimmer, a combined binder and cutter member having a hooked end, relatively movable binder and cutter members to co-operate with said hooked end, said cutter having a hook-like cutting portion, yielding means to retain said movable members in their normal tion, a rock arm to actuate said 'mem 'ers, means controlled by the movement of the needle cylinder to actuate said rock arm, and timing mechanism efiective to control the time at which said rock arm is actuated.

3. Ina yarn binder and trimmer, a sta-- hooked end, relatively movable binder and cutter members to co-operate with. said hooked end, said cutter having a hook-like cutting portion, a spring connecting said movable members, a rock arm to positively bers, said cutter having a hook-like cutting portion, resilient means to retain said sta- 'tlonary and movable binder and cutter members in assembled position, a rock arm to positively move said movable binder and cutter members, a rock shaft carrying said rock arm, a second rock arm on said rock shaft, a tension device for said rock shaft, a lever co-operating with said second rock arm, pattern controlled means to position said lever in its active position and a cylinder cam co-operating with said lever when in active position to actuate said rock shaft.

5. Ina yarn binder and'trimmer, astationary binder and cutter member having a defiected portion to receive the yarn said memher having a hooked end, a binder member movably mounted to co-operate with said hooked end, said cutter having a hook-like cutting portion, a cutter member movably mounted on said binder and on said cutter member to co-operate with said stationary cutter member, tension means to retain said binder and cutter members in assembled position, the needle cylinder, means controlledthereby to positively move said movable binder and movable cutter members in oppo- 1 said movable binder and said binder and cutter said cutter having a hook-like matting portion, a spring connected with said movable binder and with said movable cutter tending to move them toward each other. a spring connected with said movable cutter and tending to retain it in engagement with said combined binder and .cutter, the needle cylinder, a. cam thereon, means controlled by said cam and operatively connected with u said movable binder and movable cutter to actuate them, and pattern controlled means to determine the times at which such actuation takes place.

FRANK W. ROBINSON. 

